JSON Formatter
Beautify, minify and validate JSON right in your browser. Errors are pinpointed by line — nothing is uploaded.
How to use the JSON formatter
- 1Paste your JSON into the box above.
- 2Click Format to pretty-print it with your chosen indent, or Minify to strip all whitespace into one line.
- 3If the JSON is invalid, the exact error and its line/column are shown so you can fix it. Copy the result when you're done.
Frequently asked questions
Is my JSON sent to a server?
No. Parsing, formatting and validation all happen in your browser with the built-in JSON engine. Your data is never uploaded — safe for API keys, configs and private payloads.
Why does it say my JSON is invalid?
Common causes are trailing commas, single quotes instead of double quotes, unquoted keys, or a missing bracket. The tool shows the exact position (line and column) of the first error so you can jump straight to it.
What's the difference between Format and Minify?
Format (beautify) adds indentation and line breaks so JSON is easy to read. Minify removes all optional whitespace to make the smallest possible payload for sending over a network.